Therapeutic back rest



FIG. 1 is a perspective view of a therapeutic back rest, showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 4 is a an end elevational view;

FIG. 5 is an end elevational view, showing the end opposite that shown in FIG. 4; and

FIG. 6 is a bottom plan view.

FIGS. 2-6 have been drawn to a reduced scale with respect to FIG. 1. 

The ornamental design for a therapeutic back rest, as shown and described. 